Walt's older brother Seymour decided to give him some incentive to continue doing well in school. Seymour told Walt that for every "A" he received on his report card, he would reward him with a comic book. Seymour is offering Walt a(n) ________ reward

Dr. Jones is conducting a(n) _______________ research study. She carefully and systematically watches and records behavior, taking care to avoid affecting the subjects being studied

a. observational b. exploratory c. experimental d. double-blind

If an artist were to blend red, green, and blue lights together by focusing lights of those three colors on one common spot, the result would look __________

a) like nonspectral colors b) black c) like white light d) complimentary